CN104614779B - A kind of multi-parameter electromagnetic method dynamic monitoring system and its method - Google Patents
A kind of multi-parameter electromagnetic method dynamic monitoring system and its method Download PDFInfo
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Abstract
The invention discloses a kind of multi-parameter electromagnetic method dynamic monitoring system and its method, including emitter, an electrode, No. two electrodes and multi-channel electromagnetic sensor, emitter is connected with an electrode, No. two electrodes respectively, and electrode, No. two electrodes are separately positioned in the tunnel of the both sides of coal-face；Multi-channel electromagnetic sensor is made up of measuring electrode and the multiturn induction coil being wound in measuring electrode, and measuring electrode is arranged in the goaf at coal-face rear.The structure of the present invention is easier to arrangement in the limited underground coal mine of adopting of spatial dimension, and equipment price is cheap；Multicast is easily achieved, multi-track simultaneous, production efficiency is high；Receive many kinds of parameters at times using multi-channel electromagnetic sensor in a transmit cycle, realize real-time dynamic monitoring, effectively mitigate or prevent coal-face bottom plate delaying water bursting potential safety hazard.
Description
Technical field
The invention belongs to the field of mine electromagnetic method monitoring technology, and in particular to a kind of multi-parameter electromagnetic method dynamic monitoring system
System and its method.
Background technology
Coal seam bottom water bursting is one of the subject matter for threatening Safety of Coal Mine Production, most Water Inrushs with fracture
Construction is relevant.According to the survey, there is the delay hysteresis of different time scales, many gushing waters in many rift structure gushing waters
It is frequently experienced in a period of time, i.e., delayed water outlet after adopting.Delayed water outlet is the special water disaster type frequently encountered in shaft production,
Certain because having is disguised, sudden, to the very harmful of shaft production.
Solving the mine electromagnetic method technology of mine hydrogeology condition maturity at present mainly has：Radio fluoroscopy techniques, well
Lower DC detecting deep technology, MINE VOICE FREQUENCY ELECTRIC PERSPECTIVE TECHNIQUE technology, Mine Transient Electromagnetic Method etc., several electromagnetism law technologies are detecting mine
Emphasized particularly on different fields a little in hydrogeologic condition：Radio fluoroscopy techniques mainly detect the structure development situation in coal seam；Underground direct current
Electric Sounding Technology in Survey of Wellpit, which is mainly used in, solves the vertical upper top in tunnel, the partly plastid in bottom plate and front of meeting head on or characteristic layer position
(between two crossheadings) top inside detection problem, the main detection operations face of MINE VOICE FREQUENCY ELECTRIC PERSPECTIVE TECHNIQUE technology, containing in bottom plate, water guide structure
Make, Mine Transient Electromagnetic Method is mainly used in roof and floor in detection operations face and the property of water-bearing in front of driving.
Due to seat earth impermeable layer thickness, buried fault and crack are all to be continually changing during working face extraction
, the result sometime detected before working face extraction can only reflect the geological condition of detection moment at that time, exist certain
Data parameters detection feedback hysteresis quality, does not ensure that the safety of seat earth after exploitation process and back production, it is impossible to realize to coal
Each situation parameter inside layer bottom plate and colliery carries out real-time dynamic monitoring, and this all brings huge to coal mining and safety in production
Big danger and potential safety hazard.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of multi-parameter electromagnetic method dynamic
Monitoring system and its method, using many kinds of parameters, realize the real-time dynamic monitoring to seat earth in colliery, mitigate the peace in colliery
Full hidden danger.
Technical scheme：To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of multi-parameter electromagnetic method dynamic monitoring system, including emitter, an electrode, No. two electrodes and multichannel electricity
Magnetic Sensor, the emitter is connected with an electrode, No. two electrodes respectively, and an electrode, No. two electrodes are set respectively
Put in the tunnel of the both sides of coal-face；The multi-channel electromagnetic sensor is by measuring electrode and is wound on the measurement electricity
Multiturn induction coil composition on extremely, the measuring electrode is arranged in the goaf at the coal-face rear.
Further, in the present invention, the measuring electrode in the mined out region is uniformly distributed, and spaced 5~10
Rice.Depending on the equally distributed spaced area size according to goaf of measuring electrode, it is convenient for measuring.
Further, in the present invention, the measuring electrode is unpolarizable electrode, using iron staff electrode or bar magnet electrode.
The iron staff or the electrical property feature of bar magnet electrode not polarized are more stable, it is ensured that the Stability and veracity of Monitoring Data.
Further, in the present invention, the multiturn induction coil seals protection using compression-resistant material.
A kind of method of multi-parameter electromagnetic method dynamic monitoring system, comprises the following steps：
1) electrode, No. two electrodes, the transmitting are arranged in two tunnels of the both sides of coal-face
The power supply that device is launched presses period-power-supplying, transmit cycle through an electrode, No. two electrodes to the bottom plate of coal-face
Property rectangle square wave, measures work；
2) the multi-channel electromagnetic sensor receives the corresponding electromagnetic signal parameter of different time sections in a square-wave cycle；
3) data transfer received is delivered into generating date center, carries out data processing feedback.
Further, in the present invention, the step 1) in, the measurement of area side line is carried out by the way of short skew.
The metering system of short skew is transmitting-receiving away from close to investigation depth or less than investigation depth so that measurement more concentrates on emission source
Vicinity, improve signal to noise ratio, effectively prevent the weaker shortcoming of conventional long offset electromagnetic method signal.
Further, in the present invention, the step 1) in, by the way of short skew coal-face rear 5~
The measurement of area side line is carried out in 100 meters of mined out region, it is multi-track simultaneous, realize space multi-fold.
Further, in the present invention, the step 1) in the cycle size powered to the bottom plate of coal-face it is adjustable
Section.
Further, in the present invention, the step 2) in multi-channel electromagnetic sensor within a square-wave cycle time
2 periods are divided to receive different electromagnetic signal parameters, the parameter includes primary field potential value, polarization potential and induction electric
Gesture；2 periods include：
1. it is 0~t in first period0Period, received by measuring electrode in the multi-channel electromagnetic sensor
Primary field potential value and the measuring electrode where observation station relative position, apparent resistivity value can be calculated, be three-dimensional straight
Flow electrical prospecting (DC)；
2. it is t in second period0~t1Period, using the measuring electrode receiving pole in multi-channel electromagnetic sensor
Change current potential, calculate the corresponding polarizability parameter of observation station where the measuring electrode, be induced polarization method (IP)；Utilize simultaneously
The multiturn induction coil of institute's coiling in the measuring electrode receives induced electromotive force, by the way that the induced electromotive force value is converted into
Vertical magnetic field strength, you can calculate apparent resistivity value, be electromagnetic method (TEM).
3 kinds of parameters are received within a square-wave cycle time, it is easy to accomplish multi-parameter comparative analysis, enhancing supplemental characteristic
Utilization rate and refer to accuracy.
Further, in the present invention, an electrode, the position of No. two electrodes and coal-cutting machinery keep spacing away from
From, multi-channel electromagnetic sensor is laid by the requirement of net degree as coal-face back production is moved rearwards by, and in new goaf,
Until whole coal-face has been adopted.
By flow chart of data processing, the real-time electrical structure of gob floor is judged, referring again to the existing hydrology in colliery
Matter data, including impermeable layer thickness, fractured situation and other geologic informations, gushing water threshold value of the setting suitable for the working face
Grade.
Beneficial effect：The structure of the parameter electromagnetic method dynamic monitoring system of the present invention is in the limited coal mining mine of spatial dimension
Under be easier to arrangement, and equipment it is cheap；On the other hand, when side line surface sweeping is measured, it is easy to accomplish multicast, multiple tracks is same
When measure, production efficiency is high.Meanwhile, parameter electromagnetic method dynamic monitoring system of the invention is different from existing ripe mine electric
The static instrumentation of magnetic method technology, the system receives many kinds of parameters at times in a cycle using multi-channel electromagnetic sensor,
Realize real-time dynamic monitoring, effectively mitigate or prevent coal-face bottom plate delaying water bursting potential safety hazard.
Brief description of the drawings
Accompanying drawing 1 is arrangement schematic diagram of the multi-parameter electromagnetic method dynamic monitoring system of the present invention in working face；
Accompanying drawing 2 is that multi-parameter receives schematic diagram at times in the one square-wave cycle time of monitoring system of the present invention；
Accompanying drawing 3 is the three dimension direct current observation system schematic diagram of the present invention；
Accompanying drawing 4 is the induced polarization method observation schematic diagram of the present invention；
Accompanying drawing 5 is grounded source induction field monitoring system of the present invention and field strength change schematic diagram；
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of multi-parameter electromagnetic method dynamic monitoring system, including emitter, electrode, No. two electricity
Pole and multi-channel electromagnetic sensor, emitter are connected with an electrode, No. two electrodes respectively, electrode, No. two electrodes point
In the tunnel for not being arranged on the both sides of coal-face；Multi-channel electromagnetic sensor is by measuring electrode and is wound in measuring electrode
Multiturn induction coil composition, multiturn induction coil using compression-resistant material seal protection.Measuring electrode is arranged on coal-face
In the goaf at rear, the measuring electrode in mined out region is uniformly distributed, spaced 5~10 meters；Measuring electrode is not pole
Polarizing electrode, using iron staff electrode or bar magnet electrode.
A kind of method of multi-parameter electromagnetic method dynamic monitoring system, comprises the following steps：
1) electrode, No. two electrodes are arranged in two tunnels of the both sides of coal-face, emitter is sent out
The power supply penetrated presses period-power-supplying through an electrode, No. two electrodes to the bottom plate of coal-face, and cycle size can adjust；Concurrently
Periodic rectangular square wave is penetrated, work is measured；In the mined out of 5~100 meters of coal-face rear by the way of short skew
The measurement of area side line is carried out in region, it is multi-track simultaneous, realize space multi-fold.
2) multi-channel electromagnetic sensor receives the corresponding electromagnetic signal parameter of different time sections in a square-wave cycle；
It is preferred that, multi-channel electromagnetic sensor point 2 periods within a square-wave cycle time receive different electromagnetism
Signal parameter, parameter includes primary field potential value, polarization potential and induced electromotive force；2 periods include：
1. it is 0~t in first period0Period, one received by measuring electrode in multi-channel electromagnetic sensor
The relative position of observation station where secondary field potential value and measuring electrode, can calculate apparent resistivity value, be that three dimension direct current is surveyed
Visit (DC)；Wherein t0Span be 20ms~6.25s；
2. it is t in second period0~t1Period, using the measuring electrode receiving pole in multi-channel electromagnetic sensor
Change current potential, calculate the corresponding polarizability parameter of observation station where measuring electrode, be induced polarization method (IP)；Measurement is utilized simultaneously
The multiturn induction coil of institute's coiling on electrode receives induced electromotive force, by the way that induced electromotive force value is converted into perpendicular magnetic field strength
Degree, you can calculate apparent resistivity value, be electromagnetic method (TEM)；Wherein t1Span be 1s~15s.
3) data transfer received is delivered to by generating date center using wirelessly or non-wirelessly mode, carried out at data
Reason feedback.By flow chart of data processing, the real-time electrical structure of gob floor is judged, provided using the existing hydrogeology in colliery
Material includes impermeable layer thickness, fractured situation and other geologic informations, gushing water threshold levels of the setting suitable for the working face.
Number electrode, the position of No. two electrodes and coal-cutting machinery keep distance, with coal-face back production backward
It is mobile, and multi-channel electromagnetic sensor is laid by the requirement of net degree in new goaf, until whole coal-face has been adopted.
Embodiment 1
As shown in Figure 1, a kind of multi-parameter electromagnetic method dynamic monitoring system, including emitter, electrode, No. two electricity
Pole and multi-channel electromagnetic sensor, emitter are connected with an electrode, No. two electrodes respectively, electrode, No. two electrodes point
In the tunnel for not being arranged on the both sides of coal-face；Multi-channel electromagnetic sensor is by measuring electrode and is wound in measuring electrode
Multiturn induction coil composition, from the more stable iron staff that do not polarize of electrical property feature as DC electrical method and induced polarization method
Measuring electrode, while requiring that coiling multiturn induction coil is used as electromagnetic sensing according to design parameter in the upper end of unpolarizable electrode
Device, and protection is sealed using compression-resistant material；Measuring electrode is arranged in the goaf at coal-face rear, in mined out region
Measuring electrode be uniformly distributed, spaced 5 meters of space length；Measuring electrode is unpolarizable electrode, using iron staff electrode or magnetic
Bar electrode.Using the grounded source electromagnetic method real-time dynamic monitoring of square wave power supply mode.
A kind of method of multi-parameter electromagnetic method dynamic monitoring system, comprises the following steps：
1) electrode, No. two electrodes are arranged in two tunnels of the both sides of coal-face as transmitting line source,
The power supply that emitter is launched presses period-power-supplying, cycle size through an electrode, No. two electrodes to the bottom plate of coal-face
It is adjustable；And launch periodic rectangular square wave, measure work；By the way of short skew coal-face rear 5~
The measurement of area side line is carried out in 100 meters of mined out region, it is multi-track simultaneous, realize space multi-fold.
2) multi-channel electromagnetic sensor receives the corresponding electromagnetic signal parameter of different time sections in a square-wave cycle；
It is preferred that, multi-channel electromagnetic sensor point 2 periods within a square-wave cycle time receive different electromagnetism
Signal parameter, parameter includes primary field potential value, polarization potential and induced electromotive force；As shown in Figure 2,2 periods include：
1. it is 0~t in first period0Period, t0Value be 20ms；By being surveyed in multi-channel electromagnetic sensor
The relative position of observation station M, N range transmission point A, B where primary field potential value and measuring electrode that amount electrode is received, can be counted
Calculation obtains the corresponding apparent resistivity value of different observation stations, is three dimension direct current exploration (DC)；Goaf correspondence bottom is monitored in real time
The electrical parameter regularity of distribution and variation characteristic under plate；Computational methods are：
Wherein, K is electrode coefficient, and only the relative position between launch point and each measuring point is relevant, and AM, BM, AN, BN are each point
Air line distance, Δ UMNFor the potential difference between two measurement points；I is emission current.
Because the position of launch point and each observation station is, it is known that electrode coefficient K is just easy to try to achieve, so during for the transmitting
Between 0~t of section0Interior, apparent resistivity value is also easy for trying to achieve in real time below the bottom plate such as coal-face.
2. it is t in second period0~t1Period, t1Value be 1s；Using the survey in multi-channel electromagnetic sensor
Measure electrode and receive polarization potential, calculate the corresponding polarizability parameter of observation station where measuring electrode, be induced polarization method (IP)；
The current potential measured before power-cut time is Δ U=Δs U1+ΔU2(wherein Δ U1For primary field potential value, Δ U2For polarization potential
Value), it is measurable after the tomography moment to arrive polarization potential Δ U2, you can apparent chargeability value is calculated, as shown in Figure 4；
The computational methods of apparent chargeability are：
In the case of known to power-on time, by reading the potential value on corresponding moment electromagnetic sensor, you can try to achieve
Apparent chargeability.And the polarizability of ore depends mainly on the volumn concentration and its structure of electronic conduction mineral contained therein.
Content is bigger, and conductive mineral particle is more tiny, and mineralising rock (ore deposit) stone is finer and close, and polarizability is bigger.This is just qualitative judgement work
Make the real-time electrical structure of face goaf bottom plate and provide reference.
Meanwhile, in t0~t1Period, induced electromotive force is received using the multiturn induction coil of institute's coiling in measuring electrode,
By the way that induced electromotive force value is converted into vertical magnetic field strength, as shown in Figure 5, you can obtain monitoring model by correlation computations
Interior apparent resistivity value is enclosed, is electromagnetic method (TEM).
The computational methods of apparent resistivity value are：
G [H in formulaz(t)] it is implicit function, following series approximation can be used：biTo calculate system
Number, can be consulted, α in the literatureiAsked for by least square method.
During using grounded source transient electromagnetic sounding, general observation sensing secondary magnetic field vertical component is produced in horizontal coil
Induced voltage Vz(t).Because vertical magnetic field is TE ripples, to the high resolution on stratum., will be real in data processing procedure
Survey induced voltage Vz(t) vertical magnetic field H is converted toz(t) corresponding APPARENT RESISTIVITY value, is then calculated again.
Survey induced voltage Vz(t) vertical magnetic field H is converted toz(t) formula is：
Or,
The induced-current that grounded source is produced after cut-off current is different from magnetic source device, produces level faradic same
When also create vertical induced-current, the induced-current that horizontal component is excited is conducive to the detection of post non of low resistance body, and vertical component is on ground
The electric charge of layer electrical interface sensing is conducive to the detection of high resistance body.
It is preferred that, multi-channel electromagnetic sensor is in 0~t1Each see is received by the not polarization measurement electrode being grounded in period
The primary field potential value of measuring point, in t0~t1Received in period by the multiturn induction coil being wound on not polarization measurement electrode
Grounded source electromagnetic induction signal.
3) data transfer received is delivered to by generating date center using wirelessly or non-wirelessly mode, carried out at data
Reason feedback.By flow chart of data processing, the real-time electrical structure of gob floor is judged, provided using the existing hydrogeology in colliery
Material includes impermeable layer thickness, fractured situation and other geologic informations, gushing water threshold levels of the setting suitable for the working face.
Number electrode, the position of No. two electrodes and coal-cutting machinery keep distance, with coal-face back production backward
It is mobile, and multi-channel electromagnetic sensor is laid by the requirement of net degree in new goaf, until whole coal-face has been adopted.
Embodiment 2
As shown in Figure 1, a kind of multi-parameter electromagnetic method dynamic monitoring system, including emitter, electrode, No. two electricity
Pole and multi-channel electromagnetic sensor, emitter are connected with an electrode, No. two electrodes respectively, electrode, No. two electrodes point
In the tunnel for not being arranged on the both sides of coal-face；Multi-channel electromagnetic sensor is by measuring electrode and is wound in measuring electrode
Multiturn induction coil composition, from the more stable iron staff that do not polarize of electrical property feature as DC electrical method and induced polarization method
Measuring electrode, while requiring that coiling multiturn induction coil is used as electromagnetic sensing according to design parameter in the upper end of unpolarizable electrode
Device, and protection is sealed using compression-resistant material；Measuring electrode is arranged in the goaf at coal-face rear, in mined out region
Measuring electrode be uniformly distributed, spaced 10 meters of space length；Measuring electrode is unpolarizable electrode, using iron staff electrode or magnetic
Bar electrode.Using the grounded source electromagnetic method real-time dynamic monitoring of square wave power supply mode.
A kind of method of multi-parameter electromagnetic method dynamic monitoring system, comprises the following steps：
1) electrode, No. two electrodes are arranged in two tunnels of the both sides of coal-face as transmitting line source,
The power supply that emitter is launched presses period-power-supplying, cycle size through an electrode, No. two electrodes to the bottom plate of coal-face
It is adjustable；And launch periodic rectangular square wave, measure work；By the way of short skew coal-face rear 5~
The measurement of area side line is carried out in 100 meters of mined out region, it is multi-track simultaneous, realize space multi-fold.
2) multi-channel electromagnetic sensor receives the corresponding electromagnetic signal parameter of different time sections in a square-wave cycle；
It is preferred that, multi-channel electromagnetic sensor point 2 periods within a square-wave cycle time receive different electromagnetism
Signal parameter, parameter includes primary field potential value, polarization potential and induced electromotive force；As shown in Figure 2,2 periods include：
1. it is 0~t in first period0Period, t0Value be 6.25s；By being surveyed in multi-channel electromagnetic sensor
The relative position of observation station M, N range transmission point A, B where primary field potential value and measuring electrode that amount electrode is received, can be counted
Calculation obtains the corresponding apparent resistivity value of different observation stations, is three dimension direct current exploration (DC)；Goaf correspondence bottom is monitored in real time
The electrical parameter regularity of distribution and variation characteristic under plate；Computational methods are：
Wherein, K is electrode coefficient, and only the relative position between launch point and each measuring point is relevant, and AM, BM, AN, BN are each point
Air line distance, Δ UMNFor the potential difference between two measurement points；I is emission current.
Because the position of launch point and each observation station is, it is known that electrode coefficient K is just easy to try to achieve, so during for the transmitting
Between 0~t of section0Interior, apparent resistivity value is also easy for trying to achieve in real time below the bottom plate such as coal-face.
2. it is t in second period0~t1Period, t1Value be 15s；Using in multi-channel electromagnetic sensor
Measuring electrode receives polarization potential, calculates the corresponding polarizability parameter of observation station where measuring electrode, is induced polarization method
(IP)；The current potential measured before power-cut time is Δ U=Δs U1+ΔU2(wherein Δ U1For primary field potential value, Δ U2For polarization
Potential value), it is measurable after the tomography moment to arrive polarization potential Δ U2, you can apparent chargeability value is calculated, as shown in Figure 4；
The computational methods of apparent chargeability are：
In the case of known to power-on time, by reading the potential value on corresponding moment electromagnetic sensor, you can try to achieve
Apparent chargeability.And the polarizability of ore depends mainly on the volumn concentration and its structure of electronic conduction mineral contained therein.
Content is bigger, and conductive mineral particle is more tiny, and mineralising rock (ore deposit) stone is finer and close, and polarizability is bigger.This is just qualitative judgement work
Make the real-time electrical structure of face goaf bottom plate and provide reference.
Meanwhile, in t0~t1Period, induced electromotive force is received using the multiturn induction coil of institute's coiling in measuring electrode,
By the way that induced electromotive force value is converted into vertical magnetic field strength, as shown in Figure 5, you can obtain monitoring model by correlation computations
Interior apparent resistivity value is enclosed, is electromagnetic method (TEM).
The computational methods of apparent resistivity value are：
G [H in formulaz(t)] it is implicit function, following series approximation can be used：biTo calculate system
Number, can be consulted, α in the literatureiAsked for by least square method.
During using grounded source transient electromagnetic sounding, general observation sensing secondary magnetic field vertical component is produced in horizontal coil
Induced voltage Vz(t).Because vertical magnetic field is TE ripples, to the high resolution on stratum., will be real in data processing procedure
Survey induced voltage Vz(t) vertical magnetic field H is converted toz(t) corresponding APPARENT RESISTIVITY value, is then calculated again.
Survey induced voltage Vz(t) vertical magnetic field H is converted toz(t) formula is：
Or,
The induced-current that grounded source is produced after cut-off current is different from magnetic source device, produces level faradic same
When also create vertical induced-current, the induced-current that horizontal component is excited is conducive to the detection of post non of low resistance body, and vertical component is on ground
The electric charge of layer electrical interface sensing is conducive to the detection of high resistance body.
It is preferred that, multi-channel electromagnetic sensor is in 0~t1Each see is received by the not polarization measurement electrode being grounded in period
The primary field potential value of measuring point, in t0~t1Received in period by the multiturn induction coil being wound on not polarization measurement electrode
Grounded source electromagnetic induction signal.
3) data transfer received is delivered to by generating date center using wirelessly or non-wirelessly mode, carried out at data
Reason feedback.By flow chart of data processing, the real-time electrical structure of gob floor is judged, provided using the existing hydrogeology in colliery
Material includes impermeable layer thickness, fractured situation and other geologic informations, gushing water threshold levels of the setting suitable for the working face.
Number electrode, the position of No. two electrodes and coal-cutting machinery keep distance, with coal-face back production backward
It is mobile, and multi-channel electromagnetic sensor is laid by the requirement of net degree in new goaf, until whole coal-face has been adopted.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of method of multi-parameter electromagnetic method dynamic monitoring system, it is characterised in that：Comprise the following steps：
1) electrode, No. two electrodes are arranged in two tunnels of the both sides of coal-face, what emitter was launched
Power supply presses period-power-supplying to the bottom plate of coal-face, launches periodicity rectangle square wave through an electrode, No. two electrodes,
Measure work；
2) multi-channel electromagnetic sensor receives the corresponding electromagnetic signal parameter of different time sections in a square-wave cycle；
3) data transfer received is delivered into generating date center, carries out data processing feedback；
The step 2) in multi-channel electromagnetic sensor points of 2 periods within a square-wave cycle time receive different electromagnetism
Signal parameter, the parameter includes primary field potential value, polarization potential and induced electromotive force；2 periods include：
1. it is 0~t in first period0Period, received once by measuring electrode in the multi-channel electromagnetic sensor
The relative position of observation station where field potential value and the measuring electrode, can calculate apparent resistivity value, be three dimension direct current
Exploration；
2. it is t in second period0~t1Period, polarization electricity is received using the measuring electrode in multi-channel electromagnetic sensor
Position, calculates the corresponding polarizability parameter of observation station where the measuring electrode, is induced polarization method；The measurement is utilized simultaneously
The multiturn induction coil of institute's coiling on electrode receives induced electromotive force, by the way that the induced electromotive force value is converted into vertical magnetic field
Intensity, you can calculate apparent resistivity value, be electromagnetic method.
2. the method for multi-parameter electromagnetic method dynamic monitoring system according to claim 1, it is characterised in that：The step 1)
In, the measurement of area side line is carried out by the way of short skew.
3. the method for multi-parameter electromagnetic method dynamic monitoring system according to claim 2, it is characterised in that：The step 1)
In, the measurement of area side line is carried out in the mined out region at 5~100 meters of coal-face rear by the way of the short skew.
4. the method for multi-parameter electromagnetic method dynamic monitoring system according to claim 1, it is characterised in that：The step 1)
The middle cycle size powered to the bottom plate of coal-face can adjust.
5. according to the method for any described multi-parameter electromagnetic method dynamic monitoring system of Claims 1-4, it is characterised in that：Institute
State an electrode, the position of No. two electrodes and coal-cutting machinery and keep spacing distance, as coal-face back production is moved rearwards by, and
Multi-channel electromagnetic sensor is laid again by the requirement of net degree in new goaf, until whole coal-face has been adopted.
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| CN106291722B (en) * | 2016-08-25 | 2018-12-14 | 中国科学院地质与地球物理研究所 | A kind ofly-well induced-polarization measurement method and relevant device |
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| CN112505785A (en) * | 2020-10-14 | 2021-03-16 | 徐州博厚资源开发合伙企业 | Tensor resistivity monitoring method for coal and rock mass of mine |
| CN112255692B (en) * | 2020-10-16 | 2021-12-03 | 中国矿业大学 | Frequency domain electric source mine advanced electromagnetic detection method |
| CN113376704B (en) * | 2021-06-07 | 2023-01-10 | 电子科技大学 | Electric emission-magnetic reception-based interwell electromagnetic detection system and method |
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| CN102221711B (en) * | 2011-05-23 | 2013-05-01 | 吉林大学 | Advanced prediction device for tunnel water inrush by using nuclear magnetic resonance differential detection and detection method |
| CN104267442B (en) * | 2014-09-23 | 2016-08-24 | 中煤科工集团西安研究院有限公司 | A kind of transient electromagnetic for underground coal mine intends seismic detection method |
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